#include <stdio.h>

int main(void) {
	int a, b;
	int x, x1, x2; //结果 分子 分母

	a = 3;
	b = 2;
	//假设

	x1 = (a + b) / (a - b) - (a - b) / (a + b);
	x2 = (a - b) / (a + b) + (a + b) / (a - b);

	x = x1 / x2;
	//忽略小数 直接为整数运算

	printf("%d", x);

	return 0;
}